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#1
02-22-2011, 07:06 PM
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New primer still leaks on 300SD
Just replaced the older style white hand fuel primer on my 84 300SD.
Followed a great tutorial on site here (thanks). still find today that fuel is gathering at base of new pump. Made sure i installed the copper gasket washer that came with the Bosch unit. Tightened it till as far as was thought safe. Pic not the best but see attached. When I removed the threaded nipple for the secondary fuel line filter (the clear one) saw that it had no washer. Does it require one and could this be the culprit ? Anyone know what size it is to save me oulling it again to check if thats the case ? thank you 
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#2
02-23-2011, 12:04 PM
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Make sure just where leak is. Clean all threads throughly.
No, there is not any seal ring there, same connection as your brake lines to the M/C.
__________________
83 SD 84 CD
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#3
02-24-2011, 12:47 PM
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Quote:
Wipe dry the area with tissue paper, then wrap each fitting of the primer pump tightly with tissue paper and start the engine. It will be apparent shortly where the source of the leak is.
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85 300D turbo pristine w 157k when purchased 167,870 July 2025 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked
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#4
02-23-2011, 02:26 PM
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If it turns out that the leak is coming from the union that is screwed into the fuel pump - rather than the pipe onto the union - have a look here. There may be some pictures that help you (although it isn't the pump on your car as far as I know).
http://www.peachparts.com/shopforum/showthread.php?t=294499 The rubber O rings under the union have an outside diameter of 22mm on this pump.
__________________
1992 W201 190E 1.8 171,000 km - Daily driver 1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone 1965 Land Rover Series 2a Station Wagon CIS recovery therapy! 1961 Volvo PV544 Bare metal rat rod-ish thing I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior  Don't leave that there - I'll take it to bits!
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#5
02-24-2011, 12:22 AM
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thank you both so much.
As usual very informed and just the answers ands pics I was seeking. I'm doing the dreaded oil cooler line and filter housing gasket job this coming week so I'll check then and get back. thanks again for your time
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#6
02-24-2011, 04:47 AM
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Hey topshelf,
If you are about to do oil cooler lines on an OM617 perhaps you'd be willing to consider this alternative method of getting them out? I think it is an easy job - everyone else says no it is a pain in the arse... I think by removing an oil cooler bracket from the engine as well as the oil cooler lines you can get enough space to pull them out. You can make more space by removing the radiator too. Check out this thread:- http://www.peachparts.com/shopforum/showthread.php?t=273282 I'd be interested to hear of your experiences - prove me right or prove me wrong - no hard feelings! I just wanna know if my hunch is right or not.
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1992 W201 190E 1.8 171,000 km - Daily driver 1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone 1965 Land Rover Series 2a Station Wagon CIS recovery therapy! 1961 Volvo PV544 Bare metal rat rod-ish thing I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior Don't leave that there - I'll take it to bits!
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#7
02-24-2011, 08:50 AM
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^ Agreed, let us know what you eventually do.
Be sure to support (put a wrench on) the oil cooler itself when you go to loosen the lines there.
__________________
83 SD 84 CD
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#8
02-24-2011, 04:24 PM
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Thanks and sorry, I didn't mean to confuse anyone.
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83 SD 84 CD
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